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David Duffe*
Is Asterisk Suitable for Business Critical Applications?
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Our Agenda
• Myths to bust – Asterisk is a so0ware PBX – You must be a Linux guru to use Asterisk – PC-‐based telephony is bad – Open Source So0ware is for hobbyists – Asterisk is not ‘mainstream’ – Asterisk has no ‘official’ support – Asterisk will not scale for high call volumes – Asterisk is no good for ‘high availability’ soluHons
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Our Agenda
• Example configuraHon for business criHcal deployment
• Case Study Headlines • But first...
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Meet Didier
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Myth 1: Asterisk is ...
• A so0ware PBX • Well – Yes, but ... • IT IS SO MUCH MORE • Asterisk is an IP COMMUNICATIONS PLATFORM! – Powerful – Flexible – Low barriers to entry
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Myth 2: You must be a Linux guru
• Obviously, being a Linux guru is helpful in lots of areas of life ;-‐)
• But there is no need to be one for Asterisk • Basic command line Linux is useful • Or you can use a distribuHon which is GUI-‐based
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Myth 2: PC-based telephony is BAD
• PC based telephony offers the great flexibility and cost-‐effecHveness – A great range of opHons
• Dual (or more) power supplies • MulHple CPUs, HDDs (RAID) • MulHple network connecHons • MulHple form factors (from embedded to server) • BTW -‐ Even proprietary systems are PC-‐based these days
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Myth 2: PC-based telephony is BAD
• Where else could you get • HOT SWAPPABLE E1, ISDN2e, Analogue and GSM connecIvity?
• How? By USB!
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Myth 3: Open Source Software is for hobbyists
• Well, what about • Linux • Apache • MySQL • PHP • Mozilla Firefox • Open Office
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Open Source: There’s something for everyone!
OperaIng System Linux
Web Server Apache
Browser Firefox
Telephony/CommunicaIons Asterisk
Database MySQL
Customer RelaIonship Management SugarCRM
Backup Zmanda
ProducIvity Suite Open Office
CollaboraIon Suite Zimbra
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Myth 4: Asterisk is not ‘mainstream’
• Let’s take a look at a few facts and figures...
Source: Savatar
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Myth 4: Asterisk is not ‘mainstream’ 2008 Total North America Business Telephone System
Market
TradiIonal PBX and Key System Lines 13,029,148
Open Source lines 2,854,749
Total Lines 15,883,897
Open Source as a % of Total 18%
Source: Eastern Management Group
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2008: BCS Market Share (NA)
Source: Eastern Management Group
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Asterisk in the OSS IP PBX space
Source: Eastern Management Group
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2008 New IP PBX Lines (NA)
Source: Eastern Management Group
2008 Largest Suppliers Lines
Open Source 2,854,749
Nortel 2,632,145
Cisco 1,990,255
Avaya 1,752,885
Mitel 1,228,887
NEC 1,222,578
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Myth 5: Asterisk has no ‘official’ support
• Open Source Asterisk is supported by Digium (paid for)
• Asterisk Business EdiHon comes packaged with both a warranty and support
• There are also totally pre-‐packaged soluHons: SwitchVox
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The Asterisk Community
• A world-‐wide group of enthusiasts • “With enough eyeballs, all bugs are shallow.” -‐ Linus Torvalds
• Digium is the coordinaHng force, but there a thousands of people – Developing – TesHng – DocumenHng
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Myth 6: Asterisk will not scale for high call volumes
• What are high call volumes? • Asterisk can be used as a building block with other technology – SIP proxy
• But, just give an idea of the capabiliHes – Asterisk on a single server handled...
More than 10,000 calls! Source: Olle Johansson
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Myth 7: Asterisk is no good for ‘high availability’ solutions
• Asterisk is so0ware... • You can build ‘high availability’ in any way you want!
SIP Proxy
Media Servers
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Standard Operation: Primary Active
• Two Xorcom servers + dual-USB Astribank
IP Phones
PSTN
USB USB
Astribank (rear panel) USB-‐connected channel bank providing analog/digital telephony interfaces
Xorcom server (backup)
Xorcom server (primary)
Analog Phones
LAN/WAN
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If the Primary Server Fails…
Analog Phones
IP Phones
PSTN
USB USB
Astribank (rear panel) telephony interfaces
Xorcom server (backup)
Xorcom server (primary)
LAN/WAN
Switch Changes to Backup Server
Backup Server assumes Primary Server IP Address
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Case Study Headlines
• Asterisk chosen by the City of Amsterdam – 23,000 end points
• Asterisk deployed in US university – > 10,000 users
• Asterisk deployed by a KL-‐based company – 130,000 users, up to 10,000 concurrent calls
• Asterisk provides fault tolerant IP PBX for SMEs at an amazing price-‐point
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Questions or comments?
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• Asterisk is a so0ware PBX • You must be a Linux guru to use Asterisk • PC-‐based telephony is bad • Open Source So0ware is for hobbyists • Asterisk is not ‘mainstream’ • Asterisk has no ‘official’ support • Asterisk will not scale for high call volumes • Asterisk is no good for ‘high availability’ soluHons
Asterisk Myths
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Thank you
david.duffe*@telespeak.co.uk